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Home >> Toyota >> 2017 >> 86 Base, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Vehicle Stability Control System - Diagnostic Codes & Symptom Tests >> Vehicle Stability Control System >> Diagnostic Codes >> DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU [06/2016 - ] >> Description
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DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU [06/2016 - ]: Description

The skid control ECU (brake actuator assembly) receives signals from the ECM, steering sensor and TCM via the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
U0073 The +BS terminal voltage is between 9.6 and 16.5 V and bus off is judged for 0.1 seconds or more. CAN communication system
U0100 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle is being driven, and signals cannot be sent to the ECM for 0.5 seconds or more.
  • CAN communication system
  • Skid control ECU
  • ECM
U0123 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle is being driven, and signals cannot be sent to the TCM for 0.5 seconds or more.
  • CAN communication system
  • Skid control ECU
  • TCM
U0126 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle is being driven, and signals from the steering sensor cannot be received for 0.1 seconds or more.
  • CAN communication system
  • Skid control ECU
  • steering sensor
U0140 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle is being driven, and signals from the steering sensor cannot be received for 0.5 seconds or more.
  • CAN communication system
  • Skid control ECU
  • Main body ECU (Network gateway ECU)